Other Receivables and Current Assets - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other receivables and current assets	$ 200,233	$ 192,308
Receivables related to unrecognized revenue
Other receivables and current assets	170,186	152,830
Income taxes receivable, including overpayments and refunds
Other receivables and current assets	7,877	18,276
Prepaid expenses and other current assets
Other receivables and current assets	$ 22,170	$ 21,202